If we all know that he was using sarcasm, why do you still stick with your choice? You probarly also know that Bogmire wouldn't be the best choice for a villian for Brawl...
I say Ridley would be the best from all choices. Why him above other populair characters as King DeDeDe and Zant you say? Well, because Kirby already has MetaKnight, and Link already got Ganondorf. Before they are considering more villains for both franchises, I think they should rather look for a character from a franchise which isn't that much represented... like Metroid and Donkey Kong.
Now even
I as a hardcore DKC fan think that K.Rool is very unlikely, and the most logical choice for a DK character is just Diddy... Metroid on the other hand only has 2 characters truely imporant to the series, that's Samus... and Ridley. Ridley has been in almost every Metroid game, and he'll be back in Metroid Prime 3 to. Great way to advertise the game, adding a new Metroid character, villian AND unique character!
I dunno anything about FZero, but if a villian for C.Falcon is the best the fans of FZero can come up with I'm fine with that.